Worker has successfully build and deployed but returning 404
I had originally deployed a Hello World! app with a worker to a custom domain and that worked. I then set up a github repo and tried that first with a Page and now with a Worker. In both cases the build is successful and I get
Success: Deploy command completed
Success: Deploy command completed
in the logs, but now when I go to either the workers.dev URL or my custom domain I get nothing. I have the worker in the DNS records, but still 404. Not sure what I am missing